package com.yzd.learnjava.concurrency;

import java.util.ArrayList;
import java.util.concurrent.Callable;
import java.util.concurrent.ExecutorService;
import java.util.concurrent.Executors;
import java.util.concurrent.Future;

import com.yzd.learnjava.util.Print;

public class CallableDemo {
	public static void main(String[] args) {
		ExecutorService exec = Executors.newCachedThreadPool();
		ArrayList<Future<String>> results = new ArrayList<Future<String>>();
		for(int i = 0 ; i < 10; i++) {
			results.add(exec.submit(new TaskWithResult(i)));
		}
		for(Future<String> fs : results) {
			try {
				Print.print(fs.get());
			} catch (Exception e) {
				e.printStackTrace();
			}
			exec.shutdown();
		}
	}
}

class TaskWithResult implements Callable<String>{
	private int id ;
	public TaskWithResult(int id) {
		this.id = id;
	}
	
	public String call() {
		return "result of TaskWithResult " + id;
	}
}
